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A New Approach to Circuit Breaker Design Using Silicon Carbide Switches - Nov 21
Mechanical circuit breakers can be low cost with minimal losses, but they operate slowly and wear out. Solid state versions overcome the problems and are becoming increasing viable as replacements at...
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Coreless current sensor is designed fro xEV applications

It is the company’s first automotive current sensor and uses its Hall technology for precise and stable current measurements. It is compact in design and has diagnosis modes, making it suitable for xEV applications like traction inverters used in hybrid and battery-driven vehicles, as well as for battery main switches.

Proprietary temperature and stress compensation results in sensing without the negative effects caused by magnetic cores, says Infineon. The differential sensing structure is designed so that neither core nor shield are required to protect the sensor against stray fields. The integrated EEPROM allows users to customise the sensor for different applications and supports measurement ranges up to 2kA.

For system protection, the sensor has two separate output pins for overcurrent detection with a typical response time of less than 1µs. Users can program the sensitivity as well as the over-current limits and adapt the sensor to the system requirements. Drift of sensitivity plus offset over temperature is below 1.6%.

Magnetic sensing means that the sensor causes very low power losses, says the company, making it suitable for a versatile and redundant device in 400 or 800V battery main switches.

It is available in a PG-VSON-6 package or a PG-TDSO-16 version. Both devices have been developed according to ISO 26262 as safety element out of context for safety requirements up to ASIL B.

Samples of the Xensiv TLE4972-AE35D5 (PG-TDSO-16) are available now and the TLE4972-AE35S5 (PG-VSON-6) will be available in early 2022. Mass production is planned to start in 2022.



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